Details
| Original language | English |
|---|---|
| Pages (from-to) | 6030-6036 |
| Number of pages | 7 |
| Journal | Nano letters |
| Volume | 18 |
| Issue number | 9 |
| Early online date | 30 Aug 2018 |
| Publication status | Published - 12 Sept 2018 |
| Externally published | Yes |
Abstract
Two-dimensional (2D) materials have seen a broad range of applications in electronic and optoelectronic applications; however, full realization of this potential hitherto largely hinges on the quality and performance of the electrical contacts formed between 2D materials and their surrounding metals/semiconductors. Despite the progress in revealing the charge injecting mechanisms and enhancing electrical conductance using various interfacial treatments, how the microstructure of contact interfaces affects local electrical conductivity is still very limited. Here, using conductive atomic force microscopy (c-AFM), for the first time, we directly confirm the conjecture that the electrical conductivity of physisorbed 2D material-metal/semiconductor interfaces is determined by the local electronic charge transfer. Using lattice-resolved conductivity mapping and first-principles calculations, we demonstrate that the electronic charge transfer, thereby electrical conductivity, can be fine-tuned by the topological defects of 2D materials and the atomic stacking with respect to the substrate. Our finding provides a novel route to engineer the electrical contact properties by exploiting fine atomic interactions; in the meantime, it also suggests a convenient and nondestructive means of probing subtle interactions along 2D heterogeneous interfaces.
Keywords
- Electrical contacts, charge transfer, electrical conductivity, heterostructure, two-dimensional materials
ASJC Scopus subject areas
- Chemical Engineering(all)
- Bioengineering
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanical Engineering
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In: Nano letters, Vol. 18, No. 9, 12.09.2018, p. 6030-6036.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Tuning Local Electrical Conductivity via Fine Atomic Scale Structures of Two-Dimensional Interfaces
AU - Zhang, Shuai
AU - Gao, Lei
AU - Song, Aisheng
AU - Zheng, Xiaohu
AU - Yao, Quanzhou
AU - Ma, Tianbao
AU - Di, Zengfeng
AU - Feng, Xi-Qiao
AU - Li, Qunyang
N1 - Publisher Copyright: © 2018 American Chemical Society.
PY - 2018/9/12
Y1 - 2018/9/12
N2 - Two-dimensional (2D) materials have seen a broad range of applications in electronic and optoelectronic applications; however, full realization of this potential hitherto largely hinges on the quality and performance of the electrical contacts formed between 2D materials and their surrounding metals/semiconductors. Despite the progress in revealing the charge injecting mechanisms and enhancing electrical conductance using various interfacial treatments, how the microstructure of contact interfaces affects local electrical conductivity is still very limited. Here, using conductive atomic force microscopy (c-AFM), for the first time, we directly confirm the conjecture that the electrical conductivity of physisorbed 2D material-metal/semiconductor interfaces is determined by the local electronic charge transfer. Using lattice-resolved conductivity mapping and first-principles calculations, we demonstrate that the electronic charge transfer, thereby electrical conductivity, can be fine-tuned by the topological defects of 2D materials and the atomic stacking with respect to the substrate. Our finding provides a novel route to engineer the electrical contact properties by exploiting fine atomic interactions; in the meantime, it also suggests a convenient and nondestructive means of probing subtle interactions along 2D heterogeneous interfaces.
AB - Two-dimensional (2D) materials have seen a broad range of applications in electronic and optoelectronic applications; however, full realization of this potential hitherto largely hinges on the quality and performance of the electrical contacts formed between 2D materials and their surrounding metals/semiconductors. Despite the progress in revealing the charge injecting mechanisms and enhancing electrical conductance using various interfacial treatments, how the microstructure of contact interfaces affects local electrical conductivity is still very limited. Here, using conductive atomic force microscopy (c-AFM), for the first time, we directly confirm the conjecture that the electrical conductivity of physisorbed 2D material-metal/semiconductor interfaces is determined by the local electronic charge transfer. Using lattice-resolved conductivity mapping and first-principles calculations, we demonstrate that the electronic charge transfer, thereby electrical conductivity, can be fine-tuned by the topological defects of 2D materials and the atomic stacking with respect to the substrate. Our finding provides a novel route to engineer the electrical contact properties by exploiting fine atomic interactions; in the meantime, it also suggests a convenient and nondestructive means of probing subtle interactions along 2D heterogeneous interfaces.
KW - Electrical contacts
KW - charge transfer
KW - electrical conductivity
KW - heterostructure
KW - two-dimensional materials
UR - http://www.scopus.com/inward/record.url?scp=85053278855&partnerID=8YFLogxK
U2 - 10.1021/acs.nanolett.8b02921
DO - 10.1021/acs.nanolett.8b02921
M3 - Article
VL - 18
SP - 6030
EP - 6036
JO - Nano letters
JF - Nano letters
SN - 1530-6984
IS - 9
ER -